What kind of meter do I need?
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Hello all. At present I only have a trifield meter. I use radio controlled atomic clocks to see how well I am blocking emf's. The clocks do not change over by themselves when daylight savings time ends except for one room in my house. The house is very well shielded with metal siding and metal roofs and also now with metal skirting. I am trying to pinpoint where and how this radi signal is entering this room. The clock is right above the bed in my bedroom and that is the room I want to be most free from emf's. I figure that if I can block the radio siganl from entering then I will also be blocking other signals as well. I have looked on the web and found thatthe frequency is 60000 hertz. They say it is a low frequency that is broadcast from a 50000 watt transmitter in Colorado. The low frequency and thehigh amount of wattage cause the signal to have a lot of bounce to it. Can anyone tell me the best meter to use to try to locate this 60000 hertz frequency so I can find where it is entering my house? Thanks.
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Re: What kind of meter do I need?
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> Can anyone tell me the best meter to use to try to locate this 60000 hertz
> frequency so I can find where it is entering my house? Trifield meter http://www.lessemf.com/combi.html#150 covers up to 100 kHz. Emil |
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--- In [hidden email], "lessemf.com" <lessemf@...> wrote: > > > Can anyone tell me the best meter to use to try to locate this 60000 hertz > > frequency so I can find where it is entering my house? > > Trifield meter http://www.lessemf.com/combi.html#150 covers up to 100 kHz. > Emil > Trifield meters are useless they are not sensitive enough to really detect anything unless its right next to it. |
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Alpha labs can modify it to accept a 100x external
probe for magnetic fields. Then it can measure to 2microGauss. It would be nice to try adding a high-pass filter (to cut out 60 Hz) to the external probe. Then I think it would work. On Thu, Nov 12, 2009 at 10:43 PM, cris_aov <[hidden email]> wrote: > > > > > --- In [hidden email] <eSens%40yahoogroups.com>, "lessemf.com" > <lessemf@...> wrote: > > > > > Can anyone tell me the best meter to use to try to locate this 60000 > hertz > > > frequency so I can find where it is entering my house? > > > > Trifield meter http://www.lessemf.com/combi.html#150 covers up to 100 > kHz. > > Emil > > > Trifield meters are useless they are not sensitive enough to really detect > anything unless its right next to it. > > > [Non-text portions of this message have been removed] |
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In reply to this post by skolyer
So would I be looking for it on the electric meter portion of the trifield or would I look for it using the magnetic scale?
[Non-text portions of this message have been removed] |
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It would be on both but if you've done any screening
the electric should be gone (assuming your metal shields are grounded...). At those low frequencies the magnetic is much harder to screen. I think you may find that two layers separated by at least an inch will help with the magnetic part, although at 60kHz you are fighting a tough battle. Bill On Fri, Nov 13, 2009 at 6:10 PM, <[hidden email]> wrote: > > > So would I be looking for it on the electric meter portion of the trifield > or would I look for it using the magnetic scale? > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] |
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In reply to this post by skolyer
In a message dated 14/11/2009 03:34:53 GMT Standard Time, [hidden email] writes: It would be on both but if you've done any screening the electric should be gone (assuming your metal shields are grounded...). At those low frequencies the magnetic is much harder to screen. I think you may find that two layers separated by at least an inch will help with the magnetic part, although at 60kHz you are fighting a tough battle. Bill PUK - Hi bill if you had this situation with the devils plasma TV SENDING OUT CONDUCTED EMISSIONS VIA MAINS AND TELECOMS INTO YOUR HOUSE HOW WOULD YOU DEAL WITH THIS - evan turning of the mains does not work. Its picked up on am radio at 500khz-1600khz and goodness knows what other frequency spikes [Non-text portions of this message have been removed] |
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If you turn off the mains it will still conduct on the neutral.
A good quality surge protector at the TV might be the most cost effective help. If you know enough electricity to wire up a filter try to get a 3 phase one designed for switch-mode power supplies, and filter the ground too. Check for any big loops like through plumbing. You can try find a 100Amp x3 phase filter for your house. You need to locate it away from you and not too close to the transformer or other ground rod. It needs a dedicated ground that includes a buried piece of copper or aluminum flashing at least 6' long and a few inches wide. Outputs should be RF shielded. Don't believe the filter specs because they assume 50ohm sources (some publish the European specs that include low impedance sources). You want the biggest heaviest filters you can get. In the 50 to 500 lbs range that means. Make sure you know what you are doing or have an electrician involved. No point in doing it unless you've cleaned up the sources in your house. On Sat, Nov 14, 2009 at 4:50 AM, <[hidden email]> wrote: > > > > In a message dated 14/11/2009 03:34:53 GMT Standard Time, [hidden email]<wbruno%40gmail.com> > writes: > > > It would be on both but if you've done any screening > the electric should be gone (assuming your metal shields > are grounded...). At those low frequencies the magnetic > is much harder to screen. I think you may find that two > layers separated by at least an inch will help with the magnetic > part, although at 60kHz you are fighting a tough battle. > > Bill > > PUK - Hi bill if you had this situation with the devils plasma TV SENDING > OUT CONDUCTED EMISSIONS VIA MAINS AND TELECOMS INTO YOUR HOUSE HOW WOULD > YOU > DEAL WITH THIS - evan turning of the mains does not work. Its picked up > on am radio at 500khz-1600khz and goodness knows what other frequency > spikes > > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] |
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In reply to this post by skolyer
In a message dated 14/11/2009 14:48:38 GMT Standard Time, [hidden email] writes: If you turn off the mains it will still conduct on the neutral. A good quality surge protector at the TV might be the most cost effective help. If you know enough electricity to wire up a filter try to get a 3 phase one designed for switch-mode power supplies, and filter the ground too. Check for any big loops like through plumbing. You can try find a 100Amp x3 phase filter for your house. You need to locate it away from you and not too close to the transformer or other ground rod. It needs a dedicated ground that includes a buried piece of copper or aluminum flashing at least 6' long and a few inches wide. Outputs should be RF shielded. Don't believe the filter specs because they assume 50ohm sources (some publish the European specs that include low impedance sources). You want the biggest heaviest filters you can get. In the 50 to 500 lbs range that means. Make sure you know what you are doing or have an electrician involved. No point in doing it unless you've cleaned up the sources in your house. On Sat, Nov 14, 2009 at 4:50 AM, <[hidden email]> wrote: > > > > In a message dated 14/11/2009 03:34:53 GMT Standard Time, [hidden email]<wbruno%40gmail.com> > writes: > > > It would be on both but if you've done any screening > the electric should be gone (assuming your metal shields > are grounded...). At those low frequencies the magnetic > is much harder to screen. I think you may find that two > layers separated by at least an inch will help with the magnetic > part, although at 60kHz you are fighting a tough battle. > > Bill PUK replis - Thanks Bill - As you probably know the emissions are coming from a 42inch Pioneer Plasma TV across the road so everything in a 50m radius is contaminated. I have tried to speak with the couple concerned having sent them a letter last autumn but they instantly discriminated against me and have tried to criminalise me for speaking with them, if I could get the model NO of the TV I could work on the manufacturers cos this TV is the mother of all RF producers. A site called HAMNET on the internet describes some of the problems that these TVs cause for amateur radio Hams. I will look into the filter issue but I need a uk supplier any ideas. Everyday I leave my home for many hours to get away from the emissions coursing through the house and gardens, but intrestingy my wife especially seems oddly tired when she spends time in the house she often sits on the sofa and behind her is a vertical buried wire which when tested with the AM radio sings loud and proud with the modulated signal from the Plasma, I say to her and my children not to sit there and feel so stupid in doing so as there is obviously nothing to see. From this we can see how difficult it is to educate the public and evan our loved ones agaist this invisible treat. [Non-text portions of this message have been removed] |
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In Europe it might be easier to find a Schaffner, but
be advised that even an expensive one might not solve the problem. Try suggesting they plug into a power strip with a switch so they can cut off the power at night and not waste energy. If you can't sleep see if someone can help you disconnect the neutral wire. A 3 phase switch or breaker for the house is not cheap but could solve the conducted power issue (if your plumbing is isolated, which can be done affordably). No idea if this could work but conceivably if you convince the power company that you want to start a big green house with electric heat and need more power they will upgrade your service and put you on a transformer not shared with the neighbor? Some electric heaters (Softheat by Cadet) don't make big magnetic fields and are good (if cleaned and preheated and certain smelly parts removed) for those with EHS and MCS. Infrared saunas also are popular. On Sun, Nov 15, 2009 at 3:33 AM, <[hidden email]> wrote: > > > > In a message dated 14/11/2009 14:48:38 GMT Standard Time, [hidden email]<wbruno%40gmail.com> > writes: > > If you turn off the mains it will still conduct on the neutral. > > A good quality surge protector at the TV might be the most > cost effective help. If you know enough electricity to wire up > a filter try to get a 3 phase one designed for switch-mode power supplies, > and filter the ground too. > > Check for any big loops like through plumbing. > > You can try find a 100Amp x3 phase filter for your house. > You need to locate it away from you and not too close to > the transformer or other ground rod. It needs a dedicated > ground that includes a buried piece of copper or aluminum > flashing at least 6' long and a few inches wide. Outputs > should be RF shielded. Don't believe the filter specs because they assume > 50ohm sources (some publish the European specs that include low impedance > sources). You want the biggest heaviest filters you can get. In the 50 to > 500 lbs range that means. Make sure you know what > you are doing or have an electrician involved. > > No point in doing it unless you've cleaned up the sources in your house. > > On Sat, Nov 14, 2009 at 4:50 AM, <[hidden email] <paulpjc%40aol.com>> > wrote: > > > > > > > > > In a message dated 14/11/2009 03:34:53 GMT Standard Time, > [hidden email] <wbruno%40gmail.com><wbruno%40gmail.com> > > > writes: > > > > > > It would be on both but if you've done any screening > > the electric should be gone (assuming your metal shields > > are grounded...). At those low frequencies the magnetic > > is much harder to screen. I think you may find that two > > layers separated by at least an inch will help with the magnetic > > part, although at 60kHz you are fighting a tough battle. > > > > Bill > > PUK replis - Thanks Bill - As you probably know the emissions are coming > from a 42inch Pioneer Plasma TV across the road so everything in a 50m > radius is contaminated. I have tried to speak with the couple concerned > having sent them a letter last autumn but they instantly discriminated > against me and have tried to criminalise me for speaking with them, if I > could > get the model NO of the TV I could work on the manufacturers cos this TV is > > the mother of all RF producers. A site called HAMNET on the internet > describes some of the problems that these TVs cause for amateur radio Hams. > I > will look into the filter issue but I need a uk supplier any ideas. > Everyday > I leave my home for many hours to get away from the emissions coursing > through the house and gardens, but intrestingy my wife especially seems > oddly > tired when she spends time in the house she often sits on the sofa and > behind her is a vertical buried wire which when tested with the AM radio > sings > loud and proud with the modulated signal from the Plasma, I say to her and > my children not to sit there and feel so stupid in doing so as there is > obviously nothing to see. From this we can see how difficult it is to > educate > the public and evan our loved ones agaist this invisible treat. > > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] |
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In reply to this post by BiBrun
I should have added that the electric field can
also come in on power lines and other cables if they are not filtered. The filter should be at the shield, and connected to the shield. On Fri, Nov 13, 2009 at 8:34 PM, Bill Bruno <[hidden email]> wrote: > It would be on both but if you've done any screening > the electric should be gone (assuming your metal shields > are grounded...). At those low frequencies the magnetic > is much harder to screen. I think you may find that two > layers separated by at least an inch will help with the magnetic > part, although at 60kHz you are fighting a tough battle. > > Bill > > > On Fri, Nov 13, 2009 at 6:10 PM, <[hidden email]> wrote: > >> >> >> So would I be looking for it on the electric meter portion of the trifield >> or would I look for it using the magnetic scale? >> >> [Non-text portions of this message have been removed] >> >> >> > > [Non-text portions of this message have been removed] |
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